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Induced polarization for landfill leakage imaging with interferences from metallic structures: modelling and field experiment

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Název: Induced polarization for landfill leakage imaging with interferences from metallic structures: modelling and field experiment
Autoři: Hu, Leijian, Xia, Teng, Wang, Yaxun, Meng, Jian, Martin, Tina, Mao, Deqiang
Přispěvatelé: Lund University, Faculty of Engineering, LTH, Departments at LTH, Department of Biomedical Engineering, Division of Engineering Geology, Lunds universitet, Lunds Tekniska Högskola, Institutioner vid LTH, Institutionen för biomedicinsk teknik, Avdelningen för teknisk geologi, Originator, Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: Water, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Vatten, Originator
Zdroj: Geophysical Journal International. 244(1)
Témata: Engineering and Technology, Civil Engineering, Geotechnical Engineering and Engineering Geology, Teknik, Samhällsbyggnadsteknik, Geoteknik och teknisk geologi
Popis: Metallic infrastructure, such as steel sheet situated within landfills, poses significant challenges to accurate tracking of leachate using induced polarization (IP) methods. The application of IP method is efficient to delineate leakage; however, the presence of metallic structures can cause an interference on the survey and generate high-chargeability anomalies as observed in field survey. To comprehensively validate the interference caused by steel sheets, both numerical and empirical field tests were conducted. As expected, both results demonstrate that interference diminishes as the distance between survey line and metallic structure increases. Additionally, at consistent intervals, the chargeability values inverted using integral chargeability (IC) exhibit a monotonic increase with depth. Moreover, the interference induced by metallic structures is also affected by the controlling factors (i.e. depth, width and thickness) of the structure alongside the intrinsic resistivity and chargeability. Strategic utilization of the size, chargeability and spatial positioning of metallic structures relative to survey lines can significantly enhance background polarization. This approach offers a promising framework for improving the spatial resolution of subsurface targets exhibiting low polarization effects. The optimization of survey line placement, which must consider the dimensions and electrical properties of metallic structures such as steel sheets, is essential for accurately characterizing landfill leachate using the IP method.
Přístupová URL adresa: https://doi.org/10.1093/gji/ggaf420
Databáze: SwePub
Popis
Abstrakt:Metallic infrastructure, such as steel sheet situated within landfills, poses significant challenges to accurate tracking of leachate using induced polarization (IP) methods. The application of IP method is efficient to delineate leakage; however, the presence of metallic structures can cause an interference on the survey and generate high-chargeability anomalies as observed in field survey. To comprehensively validate the interference caused by steel sheets, both numerical and empirical field tests were conducted. As expected, both results demonstrate that interference diminishes as the distance between survey line and metallic structure increases. Additionally, at consistent intervals, the chargeability values inverted using integral chargeability (IC) exhibit a monotonic increase with depth. Moreover, the interference induced by metallic structures is also affected by the controlling factors (i.e. depth, width and thickness) of the structure alongside the intrinsic resistivity and chargeability. Strategic utilization of the size, chargeability and spatial positioning of metallic structures relative to survey lines can significantly enhance background polarization. This approach offers a promising framework for improving the spatial resolution of subsurface targets exhibiting low polarization effects. The optimization of survey line placement, which must consider the dimensions and electrical properties of metallic structures such as steel sheets, is essential for accurately characterizing landfill leachate using the IP method.
ISSN:0956540X
DOI:10.1093/gji/ggaf420